That means that in addition to selling Trix cereal dyed with natural ingredients like radishes and turmeric, it will also sell a version that uses classic, brighter artificial dyes: Red 40, Blue 1, and Yellow 6, the Wall Street Journal reported. The new colorful Trix will be sold at supermarkets starting in October.

General Mills said that the change came after some backlash from customers.

“Who thought it was okay to change the trix to these miserable colors?” reads a tweet in the General Mills video announcing the change. “It doesn’t taste the same BRING BACK THE COLORFUL TRIX!”

General Mills announced plans to remove artificial colors and flavoring from all cereals in 2015. However, it’s nearly impossible to replicate the color of Trix or the bright marshmallows of Lucky Charms with all natural ingredients.

Cereal sales have slumped in recent years, in part because of changing millennial tastes. General Mills reported on Wednesday that the company’s net cereal sales dropped 7% in the most recent quarter.